@article{MZM_1989_46_4_a9,
     author = {V. E. Tarakanov},
     title = {Covering numbers of regular multigraphs},
     journal = {Matemati\v{c}eskie zametki},
     pages = {66--75},
     year = {1989},
     volume = {46},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_46_4_a9/}
}